package cn.fan.study.eight.netty;

import cn.fan.study.eight.coder.NettyMessageDecoder;
import cn.fan.study.eight.coder.NettyMessageEncoder;
import cn.fan.study.eight.handler.HeartBeatReqHandler;
import cn.fan.study.eight.handler.LoginAuthReqHandler;
import cn.fan.study.eight.message.NettyConstant;
import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.timeout.ReadTimeoutHandler;

import java.net.InetSocketAddress;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

public class NettyClient {
  
    private ScheduledExecutorService executor = Executors.newScheduledThreadPool(1);
    EventLoopGroup group = new NioEventLoopGroup();
  
    public void connect(int port, String host) throws Exception {  
        // 配置客户端NIO线程组  
        try {  
            Bootstrap b = new Bootstrap();
            b.group(group).channel(NioSocketChannel.class)
                    .option(ChannelOption.TCP_NODELAY, true)
                    .handler(new ChannelInitializer<SocketChannel>() {
                @Override  
                public void initChannel(SocketChannel ch) throws Exception {  
                    ch.pipeline().addLast(new NettyMessageDecoder(1024 * 1024, 4, 4));
                    ch.pipeline().addLast("MessageEncoder", new NettyMessageEncoder());
                    ch.pipeline().addLast("readTimeoutHandler", new ReadTimeoutHandler(50));
                    ch.pipeline().addLast("LoginAuthHandler", new LoginAuthReqHandler());
                    ch.pipeline().addLast("HeartBeatHandler", new HeartBeatReqHandler());
                }  
            });  
            // 发起异步连接操作  
            ChannelFuture future = b.connect(new InetSocketAddress(host, port), new InetSocketAddress(NettyConstant.LOCALIP, NettyConstant.LOCAL_PORT)).sync();
            future.channel().closeFuture().sync();  
        } finally {  
            // 所有资源释放完成之后，清空资源，再次发起重连操作  
            executor.execute(new Runnable() {  
                @Override  
                public void run() {  
                    try {  
                        TimeUnit.SECONDS.sleep(5);
                        try {  
                            connect(NettyConstant.PORT, NettyConstant.REMOTEIP);   // 发起重连操作  
                        } catch (Exception e) {  
                            e.printStackTrace();  
                        }  
                    } catch (InterruptedException e) {  
                        e.printStackTrace();  
                    }  
                }  
            });  
        }  
    }  
      
    public static void main(String[] args) throws Exception {  
        new NettyClient().connect(NettyConstant.PORT, NettyConstant.REMOTEIP);  
    }  
      
}  